# SPDX-License-Identifier: GPL-2.0
#
# General architecture dependent options
#
#
# Note: arch/$(SRCARCH)/Kconfig needs to be included first so that it can
# override the default values in this file.
#
source "arch/$(SRCARCH)/Kconfig"
menu "General architecture-dependent options"
config ARCH_HAS_SUBPAGE_FAULTS
bool
help
Select if the architecture can check permissions at sub-page
granularity (e.g. arm64 MTE). The probe_user_*() functions
must be implemented.
config HOTPLUG_SMT
bool
config SMT_NUM_THREADS_DYNAMIC
bool
# Selected by HOTPLUG_CORE_SYNC_DEAD or HOTPLUG_CORE_SYNC_FULL
config HOTPLUG_CORE_SYNC
bool
# Basic CPU dead synchronization selected by architecture
config HOTPLUG_CORE_SYNC_DEAD
bool
select HOTPLUG_CORE_SYNC
# Full CPU synchronization with alive state selected by architecture
config HOTPLUG_CORE_SYNC_FULL
bool
select HOTPLUG_CORE_SYNC_DEAD if HOTPLUG_CPU
select HOTPLUG_CORE_SYNC
config HOTPLUG_SPLIT_STARTUP
bool
select HOTPLUG_CORE_SYNC_FULL
config HOTPLUG_PARALLEL
bool
select HOTPLUG_SPLIT_STARTUP
config GENERIC_ENTRY
bool
config KPROBES
bool "Kprobes"
depends on MODULES
depends on HAVE_KPROBES
select KALLSYMS
select TASKS_RCU if PREEMPTION
help
Kprobes allows you to trap at almost any kernel address and
execute a callback function. register_kprobe() establishes
a probepoint and specifies the callback. Kprobes is useful
for kernel debugging, non-intrusive instrumentation and testing.
If in doubt, say "N".
config JUMP_LABEL
bool "Optimize very unlikely/likely branches"
depends on HAVE_ARCH_JUMP_LABEL
select OBJTOOL if HAVE_JUMP_LABEL_HACK
help
This option enables a transparent branch optimization that
makes certain almost-always-true or almost-always-false branch
conditions even cheaper to execute within the kernel.
Certain performance-sensitive kernel code, such as trace points,
scheduler functionality, networking code and KVM have such
branches and include support for this optimization technique.
If it is detected that the compiler has support for "asm goto",
the kernel will compile such branches with just a nop
instruction. When the condition flag is toggled to true, the
nop will be converted to a jump instruction to execute the
conditional block of instructions.
